Two-stroke cycle-motor.



A. RA'DOVANOVIG.

TWO-STROKE CYCLE MOTOR.

APPLIUATION FILED P31111, 1910.

Patented July 22, 1913.

3 SHEETS'SHEET 1.

A. RADOVANOVIG.'

TWG-STROKE CYCLE MOTOR.

APPLICATION FILED PEB. 11, 1910.

Patented July 22, 1913.

LGSBW 3 SHEETS-SHEET 2. F1 i A. RADOVANOVIG.

TWO-STROKE GYGLB MOTOR. `A.EILI(LA'.I'ION FILED FEB. 1l, 1910.

Patented July 22, 1913.

3 SHEETS-SHEET 3.

' LOGSJGS.

ANDREAS RAIiOVANOVIC, 0F ZURICH, SWITZERLAND.

TWG-STROKE CYCLE-MOTOR.

Specification of Letters Patent.

Patented July 22, 1913.

Application filed February l1, 1910. Serial No. 543,392.

To all wh-0m, it may concern.'

Be it known that I, ANDREAS RADOVANO- vic, a citizen of the Republic of Switzerland, residing at Zurich, in Switzerland, have invented certain ne and useful Improvements in Two-Stroke. Cycle-Motors; and I do hereby declare the following to be a full, clear, and exact description of the invention. such as will enable others skilled in the art to which it appertains to make and'use the same, reference being had to the accompanying drawings, and to let-ters or figures of reference marked thereon, which form apart of this specication.

The present invention has Jfor its Object a ttwo-stroke cycle motor, in which the distributing means are arranged, instead fon the working cylinder itself, on the covei of theI saine, and in which the Supply of the 'mixture of air and gas is eected through channels provided in the piston rod.

ln the drawings-Figuresl to 5 show by way of example a form of execution of the invention with piston valves, and Figs. G to 10 another form Vwith rotaiy grid valves. Figa-1 is a verticall longitudinal section of the motor. TFig. 2 a side elevation thereof. Fig. 3 a front elevation partly in section seen in the direction of arrow o: in Fig. l. Fig. a is a vertical section taken on line C D of. Fig. land seen in the direction otfarrow lFig. 5 is a vertical section on line fir-B of Fig. l, seen in the saine direction. Fig. 6 is a front elevation, partly in section, of a modified form" of the invention, with rotary gridval'ves. Fig. i is a partial vertical section of the distributing means oit' the modification. llig. 8 is a cross section taken on planes cori'esponding'to the planesof secv tion designated by lines iii- B and lC--D in Fig. 1. Fig. 9 is a vertical section of a somewhat modified form of execution, wherein a tubular valve is employed instead of a piston valve. and Fig. l0 is a vertical section of'a modified form-of execution of `the rotary grid-valves.

lTig. 1' shows a double-acting two-stroke cycle motor ]ust in the moment when. the piston lr, is in' its rear dead center position in the cylinder For the admission of gas and air into the cylinder a, channels or grooves 'u are provided in the piston rod 7c by means of which the cylinder space may be put in communication with the gas and air chambers g and l respectively.

The distribution is edected by two pistonvalves s and e for the air and gas respectively` botlilarranged concentrically around the piston rod.`

The piston-valve s consists of two pai-ts connected by the webs s2 and between which a free space b is leftforining a chamber around the piston rod. By means of-this chamber Z, the cylinder a. may be put into communication with the air chamber Z when the grooves if are in the position shown in Fig. l. The movement of the distributing valves s and s can be eiiectedv by any suit- .able valve gear, as for instance by the cam gear shown in ligs. 2 and 3. The shaft ic (Fig 3) actuated from a crank (not shown) drives by means of suitable gearing y, y, a shaft irl, on which latter two cam disks (l and d are arranged. These cam disks engage rollers 1 and fr, carried by the levers 7i and it mounted on pivots o, o respectively and cause an axial displacement of the distributing valves a and s', vto which said levers are connected by rings Q, q. The gas and the air are brought to the desired degree of pressure in the chambers g and Z respectively by means of one or several pumps (not shown).

Instead of the piston-valves above de scribed, rotary grid-valves such as shown in Figs. 6, 7 and 8, may be arranged, in

which case these latter will be actuated by means oi? cam-disks d? and'zl3 (Fig. G),

which are mounted directly on shaft w and engage rollers r2 and r?, carried by bell crank levers 11i and m, which actuate rods n -andn and levers h2 and h3 which are connected to and move rotary gritbvalves s3 and 8*. instead of providing grooves or channels o'in the piston rod k, a sleeve f (Figs. 7 and 8) provided with slots may be put around the smooth piston rod r, in which case the passage for the air and gas is formed by the space -v between the sleeve and piston rod.

Fig. 9 shows a modied form in which tubular valves, as S5, S, are used instead of the piston valves and Fig. l() shows amodiiicatioii of the rotary valves, as S7, SS, hav-V ing conical packing surfaces.

The manner of working the motor is as Independently of the movement of the pis- `disk so as to admit the compressed air to the 4rair will drive the gas into the cylinder that 'bers separate fromveach other and surroundfollows: Before attaining its dead center position'at about to o-f its stroke the piston clears the openings or slots u and the exhaust of the burned gases begins. Immediately afterward the space a of the cylinder is connected with the air admission chamber ZJ by the grooves V, or spaces V.

ton itself the air valve is moved by its camcylinder, whereupon theair will completely drive out the burned gases. During the admission o`f air into the cylinder, the gas valve is opened to admit the required quantity of gas and is then closed whereupon the has entered the grooves V or spaces V. In order to open the air valve before the gas valve, to drive out the burnt gases, and to hold said airwalve open during the time the gas valve is open, so that the gas admitted to the grooves or spaces will be driven into the cylinder, the cam disk which operates the air valve is longer than the cam-disk which operates the gas-valve. During the period of opening andlclosing of the valves, the piston has begun its backward stroke and has once more shut the grooves whereupon the compression begins in the ordinary way and the complete operation is carried out in the usual manner.

I claim- 1. A two-stroke cycle moto-r comprising a cylinder, a piston therein, gas and air chaming the piston rod, said rod formed with passages to establish communication between said chambers and the cylinder.

2. A two-stroke cycle motor comprising a cylinder, a piston therein, gas and air chambers, separate from each other and surrounding the piston rod formed with pass" s to establish communication between said 'hambers and the cylinder, the said passages being opened and closed alternately by the movement of the piston rod. Y

3. A two-stroke cycle motor comprising a cylinder, a piston therein, gas and air chambers separate from each other and surrounding the piston rod, said rod formed with passages to establish communication between said chambers and the cylinder .md means to govern thepadmission of air and gas to said passages.

4.-. A two-stroke cycle motor comprising :t cylinder, a piston therein, gas and air chair-.- bers separate from eac-h other and surrounding the piston rod, said rod formed with passages to establish communication between said chambers-and the oyiinder and an admission chamber interposed between one of said chambers and the passx 5. A two-stroke cycle motor con ing' a Loeenee ing the pistonprod, said rod formed with passages to establish communication between said chambers and the cylinder, means to govern the admission of air and gas to said passages and an admission chamber interposed between one of said chambers and the passages. y

6. A two-stroke cycle motor comprising a cylinder, a piston therein, gas and air cham'- bers separate from each other and surrounding the piston rod, said rod formed with passages to establish communication between said chambers and the cylinder, said passages being opened and closed alternately by. the movement of the rod, means to govern the admission of air and gas to said passages and an admission chamber interposed between one of said chambers and the passages.

7. A two-stroke cycle motor comprising a cylinder, a piston therein, gas and air chambers separate from each other and surrounding the piston rod, said rod formed with passages to establish communication between said chambers and the cylinder and valves to control the admission of air and gas to said passages. Y

S.v A two-.stroke cycle motor comprising a cylinder, a piston therein, gas and air chambers separate from each other and surroundpassages to establish communication between said chambers and the cylinder, valves to control the admission of air and gas to said passages and an admission chamber interposed between one of said`cham..:3rs and the passages.

A two-stroke cycle motor comprising' a cylinder', a piston therein, gas and air chambers separate from each other and surroundinfr the piston rod, said rod formed with passages to establish communication between said chambers and the cylinder, a valve to control the admission of gas to the passages and admission chamber interposed between the air chamber and the passages and a second valve to control the admission of air to the admission chamber.

10. A two stroke cycle motor comprising a cylinder, a piston therein, gas and air chambers separate from each other and surrounding the piston rod, said rod formed with passages to establish communication between the chambers and the cylinder, said passages being opened and closed alternately by the movement of the rod, a valve surrounding the piston rod to contro-l the admission of gas to the passages, an admission chamber formed 'in said valve, interposed between the air chamber and the passages and a second valve surrounding the first, to control the admission of air to the admission chamber.

il. A two-stroke cycle motor comprising cylinder, a piston therein, 'gas and air yis 1 govern the admission inea-ien chambers separate from each other and surrounding the piston rod, said rod formed with passages to establish communication between the chambers and the cylinder, said passages being opened and closed alternately by the movement oit the rod, a valve surrounding the piston rod and working thereon to control the admission of gas to the passages, an admission chamber formed inesaid valve being formed so as to m-aintain communication between the air chamber and the passages during the working o'l the valve, a second valve surrounding the rst, to control the admission oit air to the passages through the admission chamber, this admission oit air being rendered independent oit the gas admission b the interposition ot the admission cham er.

l2. ln a two-stroke cycle motor a cylin- 'der having exhaust ports, a piston worlring therein, gas and air chambers separate from each other, a piston rod 'formed with passages to establish communication between said chambers and the cylinder, and rotary valves governing the admission ogt air and gas to said passages.

i3. ln a two-stroke cycle motor a cylinder having exhaust ports, a piston working therein, alternately opening and closing the ports by its movement, gas and air chambers, a piston rod formed with passages set into communication with the cylinder by the movements ot the rod, a rotary valve surrounding the piston rod governing the admission ot gas to said passages and a second rotary valve surrounding the rod to oit air to said passages.

14. ln a two-stroke cycle motor, a cylinder having exhaust ports, a piston there in, alternately closing and opening the exhaust ports by its movement, gas and air chambers7 a piston rod termed with passages set into communication with the cylinder by the movement of the rod, a rotary valve surrounding the rod, to govern the.'

admission ot gas to said passages, an admission chamber tormed in said rotary valve by' dividing it into separate parts connected with. webs and interposed between the air chamber andthe passages and a second rotary valve surrounding the first to govern the admission ot air to the admission chamber.

15. lln a two-stroke cycle motor a cylinder having exhaust ports, a piston working therein, alternately closing and opening said ports by its movement, gas and air chambers surrounding the piston rod, said rod being formed with passages set into communication with the cylinder by the Y, mission chamber,

valve, a second' lrotary thereon, governing movements of the rod, a rotary valve surrounding the rod governing the admission of gas to the passages, an admissionchamber formed in said rotary valve, a second rotary valve surrounding the rod governing the' admission of air to the passages through the admission chamber, means to actuate said valves independently ot' each other, the admission chamber rendering the air admission independent ot the gas admission.

16. in a two-strqke cycle motor, a cylinder having exhaust ports, a piston working therein, alternately closing and opening said ports by its movement, gas and air chambers, surrounding the piston rod, said piston rod being termed with passa es set into communication with the cylin er by the movements ot the rod, a rotary valve surrounding the piston rod and governing the admission ot gas to the passages, an admission chamber toi-med in said valve by dividing it into separate parts connected by webs, a second rotary valve surroundin the tirst rotary valve and governing the amission ot air to the passages through the adindependently trom the gas admission and means operated independently of the piston rod to actuate said valves. v

17.- lln a two-stroke cycle motor, a cylinder having exhaust ports, a piston worlralternately closing and opening said ports by its movement, gas and air chambers, surrounding the piston rod, said rod being formed with passages set into communication with the cylinder by the ing therein movement ot the rod, a rotary grid valve concentric to the rod and working thereon, governing the admission cit air to said passages, an admission chamber formed in said valve by dividing it into separate parts connected by webs., communicating directly with said passages, means independent of the movement of' the rod to actuate said grid valve arranged concentrically to the first and working the admission of air to the passages through the admission c hamber independently of the gas admission and means independent of therst-named means to actuate the rotary grid valve for the air admission.

ln testimony that I claim the foregoing as my invention, lt have signed my name in presence of two subscribing witnesses.

ANDREAS RADOVANOVIC.

Witnesses:

CARL Gunner, ARTHUR J. Bunnr.

Sti4 

